Mining apparatus



Nov. 30, 1937. c. F. 056000 MINING APPARATUS Filed Jan. 2, 1936 3Sheets-Sheet 1 llllllll iu lulu llllill! Nov. 30, 1937. c. F. oseoonMINING APPARATUS Filed Jan. 2, 1936 3 Sheets$heet 2 Nov; 30,1937.

v c. F. oseoon MINING APPARATUS Filed Jan. 2, 1936 3 Sheets-Sheet 3 @130my a; 1

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TRUCK DRIVE norm'z 1Z6 Swmo CYL Patented Nov. 30, 1937 UNITE STATESPATENT OFFECE MINING APPARATUS Charles F. Osgood, Claremont, N. H.,assignor to Sullivan Machinery Company, a corporation of MassachusettsThis invention relates to mining apparatus, and more particularly to animproved coal mining apparatus of the wheel mounted, track cutter typehaving an improved adjustable supporting structure for the kerf cutter.

An object of this invention is to provide an improved coal miningapparatus of an improved construction whereby the coal may be cut in animproved manner. Another object is to provide an improved coal miningapparatus of the wheel mounted, track cutter type. A further object isto provide an improved adjustable supporting structure for the kerfcutter of such an apparatus, together with improved means for adjustingthe cutter supporting structure. Yet another object is to provide animproved swinging arm structure and tiltable cutter support foradjusting the kerf cutter, together with improved means for swinging thearm structure and for tilting the cutter support. Another object is toprovide an improved coal mining apparatus having a novel rrangement ofparts and improved features of construction. These and other objectswill, howover, hereinafter more fully appear in the course of theensuing description and as more particularly pointed out in the appendedclaims.

In the accompanying drawings there are shown for purposes ofillustration one form and a modification thereof which the invention mayassume in practice.

In these drawings,

Fig. 1 is a plan view of a coal mining apparatus having embodied thereinone illustrative form of the invention.

Fig. 2 is a side elevational view of the mining apparatus shown in Fig.1.

Fig. 3 is an enlarged view in longitudinal section taken substantiallyon line 3-3 of Fig. 1.

Fig. 4 is an enlarged view in longitudinal section taken substantiallyon line 4-4 of Fig. 1.

Fig. 5 is a horizontal sectional view taken substantially on line 55 ofFig. 3.

Fig. 6 is a detail sectional view showing the locking cylinders and thecontrol valve therefor.

Fig. 7 is a fragmentary side elevational view of the forward portion ofthe mining apparatus shown in Fig. 2 illustrating a modified form oflocking means.

Fig. 8 is a diagrammatic view of the hydraulic fluid system. a

In this illustrative embodiment of the invention, there is shown a coalmining apparatus of the wheel mounted, track cutter type adapted tooperate while supported and guided by a mine track- Way, although itwill be evident that various features of the invention may beincorporated in mining apparatus of various other types.

Referring to the drawings, and more particularly to the form of theinvention shown in Figs. 1 to 6, inclusive. and Fig. 8, it will be notedthat there is shown a portable base I herein in the form of a truckmounted on wheels 2 adapted to run along a mine trackway 3 laid on themine floor. Mounted on the forward portion of the truck frame is ahorizontal turntable 4 rotatable about a vertical axis and journaled ona bearing annulus or ring 5 supported by an annular frame 8 secured tothe upper portion of the truck frame. The turntable has an integralcylindrical bearing post 1 journaled in bearing sleeves 8 and 9, theformer being supported within annular bearing supports l0 secured to theupper portion of the truck frame, while the latter is supported within acylindrical bearing support I I supported within the lower portion ofthe truck frame. Secured to the lower end of the bearing post i is aretaining plate l2, while interposed between this plate and the lowersurface of the truck frame is a bearing Washer 53. In this illustrativeconstruction, formed integral with the turntable is a rigid horizontalarm 14 overhanging the forward end of the truck frame and supporting atits outer extremity a depending annular frame portion H5 in which issupported bearing sleeves l6. J ournaled within these bearing sleevesfor rotation about a horizontal axis extending radially with respect tothe turntable axis is a cylindrical neck frame ll formed integral with arotatable head frame l8. Secured to the cylindrical bearing portion ofthe rotatable head frame is a retaining ring [9 for maintaining therotatable head frame in' position within the cylindrical frame portion[5 of the turntable arm. Pivotally mounted on a transverse pivot pin 29supported within the forwardly projecting sides 2! of the rotatable headframe is an elongated arm structure or boom 22, the axis of pivotalmovement of the arm structure being arranged at right angles to the axisof rotation of the head frame I8. This arm structure has a yoke-shapedframe 23 provided at the rear ends of the yoke arms, with trunnions 24journaled on the pivot pin 20, while secured to the forward end of theyoke-shaped frame 22 is a forwardly projecting arm frame 25 on the outerextremity of which is pivotally mounted at 26 a tiltable cutter support21 for supporting a kerf cutter 28. The kerf cutter is herein in theform of an elongated plane cutter bar 29 carried by a hanger frame 36,and mounted for circulation about the margin of the cutter bar is anendless cutter chain 3|. The bar hanger 3B is secured to an annularbearing frame 32 journaled in a bore 33 formed in the frame of thecutter support and retained in the bore by means of a retaining ring 34secured to the cutter support frame, the cutter bar being mounted forpivotal movement about an axis at right angles to the pivotal axis ofthe tiltable support and the arm structure pivot axis. Supported attherear end of the arm structure 22 is a motor 35 having its power shaft36 extending longitudinally of the arm structure, and fixed to theforward end of the motor power shaft is an element of a coupling 3? forconnecting an alined shaft 38 with the motor shaft. The shaft 38 issuitably journaled within the arm structure and has keyed thereto at itsforward end a bevel gear 39 meshing with a bevel gear 46 journaled on atransverse shaft M alined with the cutter support pivot and on which thecutter support is pivotally mounted, the shaft being supported withinparallel projections 42 of the arm frame 25. Meshing with and driven bythe bevel gear 40 is a bevel gear 43 fixed to a shaft 4Q suitablyjournaled within the frame of the tiltable cutter support 21. Fixed toand driven by the shaft 44 is a bevel gear 45 meshing with a bevel gear46 connectible by a sliding clutch 4'! to a shaft 48 herein suitablyjournaled within the frame of the cutter support and arranged with itsaxis alined with the cutter bar pivot axis. Keyed to the shaft 48 is achain sprocket 49 which engages and drives the endless cutter chain 3 i.It will thus be seen that irrespective of the adjusted position of thearm structure and cutter support about their pivotal axes, the cutterchain may be driven by the motor 35 and that the cutter chain may remainstationary during running of the motor by disconnecting the slidingclutch 41.

A motor 50 herein of the hydraulically operated reversible type isarranged within the frame of the cutter support 21 and the power shaft5| of this motor has keyed thereto a spur gear 52 meshing with a largeinternal gear 53 formed integral with the cylindrical bearing support 32for the cutter bar hanger. It will thus be seen that the cutter bar maybe swung about its pivot relative to the cutter support in either ofopposite directions, depending upon the direction of rotation of themotor 523, and the liquid may be trapped in the motor to lock the cutterbar in its adjusted position about its pivot.

Now referring to the improved means for swinging the arm structure aboutits pivot relative to the rotatable head frame and for tilting thecutter support relative to the arm structure, it will be noted thatpivotally mounted at 55 within the projecting 'portions 2!, 2! of therotatable head frame is a pair of hydraulic cylinders or rams 56 eachcontaining a reciprocable piston 51 having its piston rod 58 extendingforwardly through the packed front head 59 of the cylinder, and theforward extremities of the piston rods are pivotally connected at iii)to projections 6! formed integral cylinders E32 and 63, each containinga reciprocable piston 54 having a piston rod guided within a bracket 66secured to the arm structure. The

outer extremity of each piston rod is provided with a locking extremityor plunger E? engageable with looking recesses $8 formed respectively onthe rotatable head frame and the frame of the tiltable cutter support.The pistons are constantly urged toward their locking position by meansof coil springs 69 and a valve i9 is provided for controlling the flowof liquid pressure to the cylinders to effect release of the lockingplungers, in a manner to be later described. This valve has an operatinglever H provided with usual detent means for holding it in its differentpositions.

The means for rotating the turntable 4i and the head frame l8 abouttheir respective axes comprises a pair of hydraulic cylinders or ramsl5, '85, each containing a reciprocable piston '55. The cylinders aremounted within the truck frame and arranged in parallel relation on axesextending longitudinally of the truck frame, and spaced equi-distantlyfrom the longitudinal vertical center of the truck as shown in Fig. 5.These cylinders are provided with front heads Tl attached to the truckframe, and the pistons have piston rods I8 extending rearwardly throughthe packed rear heads 79 of the cylinders. Secured to the rear ends ofthe piston rods are brackets 86, each having journaled thereon a cableguiding pulley 8|. J ournaled coaxially with and rotatable relative tothe turntable 4 beneath the latter is a large guide sheave or pulley 32,while arranged at the rear of the guide sheave 32 is a horizontal guidepulley 83. Supported by brackets 34 at the opposite sides of thecylindrical bearing portion iii are inclined guide pulleys 85, whilesecured to the rotatable head frame and surrounding the head frame axisis a cable drum 86. A pair of cables Bl, 81 are fixed at one end to thetruck frame, and these cables pass around the guide pulleys 8i and thenrearwardly around the opposite sides of the guide pulley 83 and aboutthe opposite sides of the large guide sheave 82, over the guide pulleys85 and around the cable drum 85, the opposite ends of the cables beingfixed to the cable drum 8B. The means for locking the rotatable headframe against rotation during turntable rotation comprises a locking pin88 guided within a bracket 89 mounted on the turntable and having anoperating lever 95?. This locking pin is adapted to project withinlocking recesses 9! formed in the rotatable head frame so that when oneof these locking recesses registers with the pin, the pin may be slidinwardly to lock the head frame against rotation. The turntable 4 isprovided with a similar locking pin Q2 guided on the truck body andhaving an operating lever 93 so that the turntable will be lockedagainst rotation during rotation of the head frame. From the foregoing,it will be evident that when hydraulic pressure is supplied to the frontend of one or the other of the cylinders 15, 15, the turntable and headframe may be selectively rotatable about their respective axes in onedirection or the other, depending upon which cylinder is operated. Asshown in Fig. 3, supported within the truck frame is a hydraulic motor95 of the reversible type having its power shaft connected to alongitudinal transmission shaft 9%, herein journaled within axlehousings 9? secured to the truck frame. Arranged within the axlehousings and fixed to the shaft 96 are worms 98 meshing with worm wheels99 keyed to the truck wheel axles Iiiil. When hydraulic pressure issupplied to the motor 95, the truck wheels may be driven at any desiredspeed and in either of opposite directions.

When liquid is trapped'within the motor 95, the truck wheels may belocked against rotation.

Now referring to the means for supplying pressure to the varioushydraulic devices, it will be noted that supported by the truck frame isa motor I62 having its power shaft I63 connected to the motor shaft of agear pump I04. This gear pump is submerged in liquid, preferably oil,contained within a tank I65 supported by the truck frame. As shown inFig. 8, the discharge side of the pump is connected through a conduitI06 to the intake passage of a valve box I 6?, the discharge passages ofthe valve box being connected through branched conduits H18, I68 to aconduit I09 leading to the tank. Contained in the valve box are slidevalves of the conventional balanced type III], III, H2, and H3, andthese valves are adapted to control the supply of liquid pressure toward ends of the cylinders 56.

the various hydraulic cylinders and the hydraulic motors. The valve IIBcontrols the supply of liquid pressure through conduits I I4, II to theforward ends of the cylinder I5, while the rear ends of these cylindersare connected through conduits H5, H5 to a conduit H6 leading to thetank for conducting oil leakage back to the tank. The valve I I Icontrols the flow of liquid pressure through conduits H7, M8 to thehydraulic truck Wheel driving motor 95. The valve II 2 controls thesupply of liquid pressure through a conduit H9 and branched conduitsI20, I26 to the rear endsiof the cylinders 56, and through a conduit I2!and branched conduits I22, I22 to the for- The valve II3 controls theflow of liquid pressure through conduits I23, 52 to the hydraulic motor50. Conduits I23, I 24, I25 connect the intake passage of the valve boxto the control valve ID for the hy draulic lock cylinders 62, 63, whilea conduit 26 connects the valve I0 to the discharge passage of the valvebox. Conduits I21 and I28 connect the valve 10 with the lock cylinders62, 63. It will thus be seen that when the valve I0 is in the positionshown in Fig. 8, hydraulic pressure may flow through the conduit I25,through a passage in the valve and through conduits I21, I28 to the lockcylinders 62, 63. When the position of the valve I0 is reversed theconduits I21, I28 will be connected to the discharge conduit I26. Bysuitably positioning the valve l6, hydraulic pressure will be suppliedto oneof the lock cylinders, while the other lock cylinder is connectedto the discharge conduit.

In Fig. '7 there is shown a modified form of locking means for the armstructure and cutter support, wherein the locking means is mechanicallyoperated. This locking means comprises locking plungers I3!) and I3Iguided in brackets I32 attached to the side of the arm structure. Theseplungers are engageable with looking recesses I33 formed on the headframe and cutter support, in the manner shown. Secured to the plungersare rods I34 and I35, respectively, each formed at its inner end forengagement with a rotatable cam I36 mounted on the arm struc ture. Coilsprings i3! surrounding these rods and engaging collars I38 fixed to therods urge the plungers toward their released position. The cam E36 hasan operating lever i39 provided with usual detent means for holding itin its different positions. When the cam is in the position shown inFig. '7, both plungers are held in locking engagement with a lockingrecess so that both the arm structure and cutter support are lockedagainst pivotal movement. When the cam is turned through 90 in onedirection or the other, one of the plungers is maintained connectedwhile the other is released by its coil spring. It will be evident thatif desired the locking plungers and cooperating recesses may besubstituted with contractible brake bands engaging braking surfaces onthe head frame and cutter support for yieldingly locking the armstructure and cutter support against swinging movement.

The mode of operation of the improved mining apparatus will be clearlyapparent from the description given. The apparatus may be propelledalong the mine trackway at any desired speed by the hydraulic motor 95driving the truck wheels, this motor being reversible to enablepropulsion of the apparatus in either direction along the mine trackway.The turntable may be rotated to swing the arm structure horizontallyabout the turntable axis by means of hydraulic cylinders I5, 75 underthe control of the slide valve III], and these same cylinders may beoperated to rotate the head frame about its axis with respect to theturntable to move the kerf cutter into either horizontal or verticalcutting position. The arm structure and cutter support may be swungabout their respective pivots by the hydraulic cylinders 56 under thecontrol of the slide valve I I2, and the cutter bar may be swung aboutits pivot relative to the cutter support in either of oppositedirections at the desired speed by the hydraulic motor controlled by theslide valve II3. By adjusting the turntable, rotating the head frame,and swinging the arm structure, and cutter support, the kerf cutter maybe positioned to out kerfs in the coal face' at any desired locationbetween ribs, between the mine roof and mine floor, and in either rib,in the manner well understood by those skilled in the art.

As a result of this invention it will be noted that an improved miningapparatus is provided having an improved adjustable supporting structurefor the kerf cutter, and improved adjusting means for the supportingstructure whereby the kerf cutter may be positioned at any desiredlocation with respect to the work in an improved manner. It will furtherbe evident that by the provision of the separate locking means for thearm structure and cutter support, and by the improved arrangement of theparts disclosed, it is possible by means of but a single pair ofhydraulic cylinders to effect swinging of the arm structure and tiltingof the cutter support about its pivot relative to the arm structure.Further, by the provision of hydraulic variable speed driving motors forthe truck wheels and kerf cutter, the apparatus may be propelled alongthe mine trackway and the kerf cutter swung about its pivot at anydesired speed, in an improved manner. Other uses and advantages of theimproved mining apparatus will be clearly apparent to those skilled inthe art.

While there are in this application specifically described one form anda modification thereof which the invention may assume in practice, itwill be understood that this form and modification are shown forpurposes of illustration and that the invention may be further modifiedand embodied in various other forms without departing from its spirit orthe scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. In a mining apparatus, a swinging arm structure, a cutter supportpivotally mounted on said arm structure, a kerf cutter carried by saidcutter support, and common motor operated devices having common finalterminal elements through which arm structure swing and cutter supporttilt are effected for swinging said arm structure and for tilting saidcutter support about its pivot relative to said arm structure to movesaid kerf cutter into parallel cutting planes, said devices operative toeifect swinging of said arm structure while said cuttersupport remainsstationary as regards swinging movement about its pivot relative to saidarm structure.

2. In a mining apparatus, a swinging arm structure, a cutter supportpivotally mounted on said arm structure with its pivot axis parallel tothe axis of arm structure swing, and a pair of hydraulic cylinders, eachcommon to arm structure swinging and cutter support tilting, connectedto said cutter support, for swinging said arm structure and for tiltingsaid cutter support about its pivot relative to said arm structure.

3. In a mining apparatus, a swinging arm structure, a cutter supportpivotally mounted on said arm structure, a kerf cutter carried by saidsupport, common motor operated devices operable both for swinging saidarm structure and for tilting said cutter support about its pivotrelative to said arm structure to move said kerf cutter into parallelcutting planes, and devices separate from said motor operated devicesfor locking said arm structure against swinging movement about its pivotduring tilting of said cutter support and for locking said cuttersupport to said arm structure during swinging of the latter about itspivot.

4. In a mining apparatus, a support, a swinging arm structure pivotallymounted on said support, a cutter support pivotally mounted on said armstructure, a kerf cutter carried by said cutter support, and commonmotor operated devices extending between said first support and saidcutter support having common final terminal elements through which armstructure swing and cutter support tilt are effected for swinging saidarm structure about its pivot and for tilting said cutter support aboutits pivot relative to said arm structure to move said kerf cutter intoparallel cutting planes, said devices operative to effect swinging ofsaid arm structure while said cutter support remains stationary asregards swinging movement about its pivot relative to said armstructure.

5. In a mining apparatus, a support, a swinging arm structure pivotallymounted on said support, a cutter support pivotally mounted on said armstructure, a kerf cutter carried by said cutter support, common motoroperated devices extending between said first support and said cuttersupport and operable both for swinging said arm structure about itspivot and for tilting said cutter support about its pivot relative tosaid arm structure to move said kerf cutter into parallel cuttingplanes, and means separate from said motor operated devices for lockingsaid arm structure to said first support during swinging of said cuttersupport and for locking said cutter support to said arm structure duringswinging of the latter about its pivot relative to said first support.

6. In a mining apparatus, a rotatable head frame, a swinging armstructure pivotally mounted on said head frame, a cutter supportpivotally mounted on said arm structure, and common motor operateddevices extending between said head frame and said cutter support andhaving common final terminal elements through which arm structure swingand cutter support tilt are effected for swinging said arm structure andfor tilting said cutter support about its pivot relative to said armstructure, said devices operative to effect swinging of said armstructure while said cutter support remains stationary as regardsswinging movement about its pivot relative to said arm structure.

7. In a mining apparatus, a rotatable head frame, a swinging armstructure pivotally mounted on said head frame, a cutter supportpivotally mounted on said arm structure, and hydraulic cylinder andpiston devices extending between and each connected both to said headframe and to said cutter support for swinging said arm structure and fortitlting said cutter support about its pivot relative to said armstructure.

8. In a mining apparatus, a rotatable head frame, a swinging armstructure pivotally mounted on said head frame, a cutter supportpivotally mounted on said arm structure, hydraulic cylinder and pistondevices extending between said head frame and said cutter support forswinging said arm structure and for tilting said cutter support aboutits pivot relative to said arm structure, said devices common to bothfunctions, and means for locking said arm structure against swingingmovement relative to said head frame during tilting of said cuttersupport and for looking said cutter support to said arm structure duringswinging of the latter relative to said head frame.

9. In amining apparatus, a swinging arm structure, a cutter supportpivotally mounted on said arm structure, locking devices mounted on saidarm structure for locking said arm structure against swinging movementabout its pivot and for locking said cutter support to said armstructure, and means mounted on said arm structure for simultaneously orseparately operating said locking devices, and for precludingsimultaneous release of said locking devices, said operating meansalways maintaining said locking device for said arm structure in lockingposition during swinging of the cutter support about its pivot relativeto said arm structure and vice versa.

10. In a mining apparatus, a swinging arm structure, a cutter supportpivotally mounted on said arm structure, locking devices mounted on saidarm structure for locking said arm structure against swinging movementabout its pivot and for locking said cutter support to said armstructure, means mounted on said arm structure for simultaneously orseparately operating said locking devices and for precludingsimultaneous release of said locking devices, said operating meansalways maintaining said locking device for said arm structure in lookingposition during swinging of the cutter support about its pivot relativeto said arm structure and vice versa, and means for swinging said armstructure about its pivot when its locking device is released and saidcutter support locking device is connected.

11. In a mining apparatus, a swinging arm structure a cutter supportpivotally mounted on said arm structure, locking devices mounted on saidarm structure for locking said arm structure against swinging movementabout its pivot and for locking said cutter support to said armstructure, means mounted on said arm structure for simultaneously orseparately operating said looking devices and for precludingsimultaneous release of said locking devices, and common means connectedto said cutter suport and common to 1 said cutter support about itspivot relative to said arm structure when its locking device is releasedand said arm structure locking device is connected.

12. In a mining apparatus, a swinging arm istitucture, a cutter supportpivotally mounted on said arm structure, hydraulic locking devicesmounted on said arm structure for locking the latter against swingingmovement during tilting of said cutter support about its pivot relativeto said arm structure and for locking said cutter support to said armstructure during swinging of the latter about its pivot, and valve meansmounted on said arm structure for effecting simultaneous or separateoperation of said locking devices,

13. In a mining apparatus, a swinging arm structure, a cutter supportpivotally mounted on said arm structure, hydraulic locking devicesmounted on said arm structure for locking the latter against swingingmovement during tilting of said cutter support about its pivot relativeto said arm structure and for locking said cutter support to said armstructure during swinging of the latter about its pivot, valve-meansmounted on said arm structure for effecting simultaneous or separateoperation of said locking devices, and hydraulically operated means forswinging said arm structure about its pivot when its locking device isreleased and said cutter support is looked to said arm structure and fortilting said cutter support relative to said arm structure when itslocking device is released and said arm structure is locked againstswinging movement by its locking device.

14. In a mining apparatus, a portable base, a horizontal turntable onsaid base, a support mounted on said turntable for rotation with respectthereto about a horizontal axis, an arm pivotally mounted on saidsupport to swing relative thereto, a cutter support pivotally mountedon'the outer extremity of said arm, a kerf cutter pivotally mounted onsaid cutter support to swing relative thereto, and hydraulicallyoperated de vices for rotating said turntable relative to said base, forrotating said support relative to said turntable for swinging said armrelative to said support, for tilting said cutter support relative tosaid arm and for swinging said kerf cutter about its pivot relative tosaid support, said hydraulic devices for swinging said arm and tiltingsaid outter support being common to both functions and said cuttersupport always remaining stationary as regards tilting movement relativeto said arm during swinging of the latter.

gl5. In a mining apparatus, a portable base, a horizontal turntable onsaid base, a support mounted on said turntable for rotation with respectthereto about a horizontal axis, an arm pivotally mounted on saidsupport to swing relative thereto, a cutter support pivotally mounted onthe outer extremity of said arm, a kerf cutter pivotally mounted on saidcutter support to swing relative thereto, hydraulically operated devicesfor rotating said turntable relative to said base,

'for rotating said support relative to said turnand said cutter supportalways remaining stationary as regards tilting movement relative to saidarm during swinging of the latter, and hydraulically operated devicesfor propelling the apparatus.

16. In a mining apparatus, an adjustable member, a cutter supportpivotally mounted on said adjustable member for tilting movement withrespect thereto, a kerf cutter carried by said cutter support, andhydraulic cylinder and piston devices for adjusting said member and fortilting said cutter support relative to said member to move said kerfcutter into parallel cutting planes, said devices common to bothadjustment of said member and tilting of said cutter support.

17. In a mining apparatus, a support, an arm pivotally mounted on saidsupport to swing with respect thereto, a cutter support rotatablymounted on the outer extremity of said arm, said cutter support having aprojecting frame portion, a kerf cutter carried by said cutter support,and an adjusting device extending between said first support and saidprojecting frame portion and pivotally connected thereto for swingingsaid arm relative to said first support and for tilting said cuttersupport relative to said arm to move said kerf cutter into parallelcutting planes.

18. In a mining apparatus, a frame, a supporting structure pivotallymounted on said frame to swing with respect thereto, a cutter supportpivotally mounted on said supporting structure to tilt relative theretoabout an axis parallel with the pivotal axis of said supportingstructure, a plane kerf cutter carried by said cutter support, and meanscommon both to swinging of said supporting structure and tilting of saidcutter support and embodying extensible adjusting devices extendingbetween said frame and said cutter support for swinging said supportingstructure and tilting said cutter support to move said kerf cutter intoparallel cutting planes.

l9. Ina mining apparatus, a frame, a supporting, structure pivotallymounted on said frame to swing with respect thereto, a cutter'supportpivotally mounted on said supporting structure to tilt relative theretoabout an axis parallel with the pivotal axis of said supportingstructure, a plane kerf cutter carried by said cutter support, and meansembodying extensible adjusting devices extending between and eachconnected at its opposite extremities to said frame and said cuttersupport for swinging said supporting structure and tilting said cuttersupport to move said kerf, cutter into parallel cutting planes, saidswinging means also embodying means for locking said cutter supportagainst tilting movement about its pivotal axis relative to saidsupporting structure during swinging of the latter.

20. In a mining apparatus, a frame, a supporting structure pivotallymounted on said frame to swing with respect thereto, a cutter supportpivotally mounted on said supporting structure to tilt relative theretoabout an axis parallel with the pivotal axis of said supportingstructure, a plane kerf cutter carried by said cutter support, and meansembodying extensible adjusting devices extending between said frame andsaid cutter support and common both to supporting structure swing andcutter support tilt for swinging said supporting structure and tiltingsaid cutter support to move said kerf cutter into parallel cuttingplanes, said swinging and tilting means also embodying means for lockingsaid cutter support against tilting movement about its pivotal axisrelative to said supporting structure during swinging of the latter andfor locking said supporting structure against swinging movement aboutits pivotal axis relative to said frame during tilting of said cuttersupport.

21. In a mining apparatus, a revoluble frame mounted for rotation abouta horizontal axis, a supporting structure pivotally mounted on saidframe to swing with respect thereto, a cutter support pivotally mountedon said supporting structure to tilt relative thereto about an axisparallel with the pivotal axis of said supporting structure, a planekerf cutter carried by said cutter support, and means embodyingextensible adjusting devices extending between and each connected at itsopposite extremities to said revoluble frame and said cutter support forswinging said supporting structure and tilting said cutter support tomove said kerf cutter into parallel cutting planes in any position ofsaid revolving frame about its axis of rotation.

22. In a mining apparatus, a revoluble frame mounted for rotation abouta horizontal axis, a supporting structure pivotally mounted on saidframe to swing with respect thereto, a cutter support pivotally mountedon said supporting structure to tilt relative thereto about an axisparallel with the pivotal axis of said supporting structure, a planekerf cutter carried by said cutter support, and means embodyingextensible adjusting devices extending between said revolu ble frame andsaid cutter support and each common both to supporting structure swingand cutter support tilt for swinging said supporting structure andtilting said cutter support to move said kerf cutter into parallelcutting planes in any position of said revolving frame about its axis ofrotation, said swinging means also embodying means for locking saidcutter support against tilting movement about its pivotal axis relativeto said supporting structure during swinging of the latter.

23. In a mining apparatus, a revoluble frame mounted for rotation abouta horizontal axis, a supporting structure pivotally mounted on saidframe to swing with respect thereto, a cutter support pivotally mountedon said supporting structure to tilt relative thereto about an axisparallel with the pivotal axis of said supporting structure, a planekerf cutter carried by said cutter support, and means embodyingextensible adjusting devices extending between and each connected at itsopposite extremities to said revoluble frame and said cutter support forswinging said supporting structure and tilting said cutter support tomove said kerf cutter into parallel cutting planes in any position ofsaid revolving frame about its axis of rotation, said swinging andtilting means also embodying means for locking said cutter supportagainst tilting movement about its pivotal axis relative to saidsupporting structure during swinging of the latter and for locking saidsupporting structure against swinging movement about its pivotal axisrelative to said frame during tilting of said cutter support.

24. In a mining apparatus, a frame, a supporting structure pivotallymounted on said frame to swing in a vertical direction with respectthereto, a cutter support pivotally mounted on said supporting structureto tilt relative thereto about an axis parallel with the supportingstructure swing axis, a horizontal plane kerf cutter carried by saidcutter support, and means embodying extensible adjusting devicesextending between said frame and said cutter support and common tosupporting structure swing and cutter support tilt for swinging saidsupporting structure and tilting said cutter support about theirrespective pivotal axes to move said kerf cutter into parallelhorizontal cutting planes at different elevations.

25. In a mining apparatus, a frame, a supporting structure pivotallymounted on said frame to swing in a vertical direction with respectthereto, a cutter support pivotally mounted on said supporting structureto tilt relative thereto about an axis parallel with the supportingstructure swing axis, a horizontal plane kerf cutter carried by saidcutter support, and means embodying extensible adjusting devicesextending between and each connected at its opposite extremities to saidframe and said cutter support for swinging said supporting structure andtilting said cutter support about their respective pivotal axes to movesaid kerf cutter into parallel horizontal cutting planes at differentelevations, said swinging means also embodying means for locking saidcutter support against tilting movement about its pivotal axis relativeto said supporting structure during swinging of the latter.

26. In a mining apparatus, a frame, a supporting structure pivotallymounted on said frame to swing in a vertical direction with respectthereto, a cutter support pivotally mounted on said supporting structureto tilt relative thereto about an axis parallel with the supportingstructure swing 0 axis, a horizontal plane kerf cutter carried by saidcutter support, and means embodying extensible adjusting devicesextending between and each connected at its opposite extremities to saidframe and said cutter support for swinging said supporting structure andtilting said cutter support about their respective pivotal axes to movesaid kerf cutter into parallel horizontal cutting planes at differentelevations, said swinging and means also embodying means for lockingsaid cutter support against tilting movement about its pivotal axisrelative to said supporting structure during swinging of the latter andfor locking said supporting structure against swinging movement aboutits pivotal axis relative to said frame during tilting of said cuttersupport.

27. In a mining apparatus, a revoluble frame mounted for rotation abouta horizontal axis, a supporting structure pivotally mounted on saidframe, said frame being revoluble to position said supporting structureto swing in vertical and horizontal directions with respect thereto, acutter support pivotally mounted on said supporting structure to tiltrelative thereto about an axis parallel with the supporting structureaxis, a horizontal plane kerf cutter carried by said cutter support, andmeans embodying extensible adjusting devices extending between and eachconnected at its opposite extremities to said revoluble frame and saidcutter support for swinging said supporting structure and tilting saidcutter support about their respective pivotal axes to move said kerfcutter into parallel cutting planes in either said horizontal orvertical positions of said supporting structure.

28. In a mining apparatus, a revoluble frame mounted for rotation abouta horizontal axis, a supporting structure pivotally mounted on saidframe, said frame being revoluble to position said supporting structureto swing in vertical and horizontal directions with respect thereto, acutter support pivotally mounted on said supporting structure to tiltrelative thereto about an axis parallel with the supporting structureaxis, a horizontal plane kerf cutter carried by said cutter support, andmeans embodying extensible adjusting devices extending between saidrevoluble frame and said cutter support and common to supportingstructure swing and cutter support tilting for swinging said supportingstructure and tilting said cutter support about their respective pivotalaxes to move said kerf cutter into parallel cutting planes in eithersaid horizontal or vertical positions of said supporting structure, saidswinging means also embodying means for looking said cutter supportagainst tilting movement about its pivotal axis relative to saidsupporting structure during swinging of the latter.

29. In a mining apparatus, a revoluble frame mounted for rotation abouta horizontal axis, a supporting structure pivotally mounted on saidframe, said frame being revoluble to position said supporting structureto swing in vertical and horizontal directions with respect thereto, acutter support pivotally mounted on said supporting structure to tiltrelative thereto about an axis parallel with the supporting structureaxis, a horizontal plane kerf cutter carried by said cutter support, andmeans embodying extensible adjusting devices extending between and eachconnected at its opposite extremities to said revoluble frame and saidcutter support for swinging said supporting structure and tilting saidcutter support about their respective pivotal axes to move said kerfcutter into parallel cutting planes in either said horizontal orvertical positions of said supporting structure, said swinging andtilting means also embodying means for locking said outter supportagainst tilting movement about its pivotal axis relative to saidsupporting structure during swinging of the latter and for locking saidsupporting structure against swinging movement about its pivotal axisrelative to said frame during tilting of said cutter support.

30. In a mining apparatus, a swinging arm structure, a cutter supportpivotally mounted on said arm structure for tilting movement relativethereto, a kerf cutter carried by said cutter support, and common motoroperated devices having common final terminal elements through which armstructure swing and cutter support tilt are eifected for swinging saidarm structure and tilting said cutter support about its pivot relativeto said arm structure to move said kerf cutter into parallel cuttingplanes, said devices for swinging said arm structure being operableindependently of tilting movement of said cutter support about its pivotrelative to said arm structure.

31. In a mining apparatus, a swinging arm structure, a cutter supportpivotally mounted on said arm structure for tilting movement relativethereto, a, kerf cutter carried by said cutter support, common motoroperated devices for swinging said arm structure and tilting said cuttersupport about its pivot relative to said arm structure to move said kerfcutter into parallel cutting planes, said devices for swinging said armstructure being operable independently of tilting movement of saidcutter support about its pivot relative to said arm structure, anddevices distinct from said motor operated devices for locking said armstructure against swinging movement about its pivot during tilting ofsaid cutter support and for locking said cutter support, against tiltingmovement relative to said arm structure during swinging of the latter.

32. In a mining apparatus, a rotatable head frame, a swinging armstructure pivotally mounted on said head frame, a cutter supportpivotally mounted on said arm structure for tilting movement relativethereto, a kerf cutter carried by said cutter support, and common motoroperated devices extending between said head frame and said cuttersupport having common final terminal elements through which armstructure swing and cutter support tilt are effected for swinging saidarm structure and for tilting said cutter support about its pivotrelative to said arm structure to move the kerf cutter into parallelcutting planes, said devices operative to efiect swinging of said armstructure independently of the tilting movement of said cutter supportabout its pivot relative to said arm structure.

CHARLES F. OSGOOD.

Patent No. 2,100,550.

CERTIFICATE OF CORRECTION.

/ November 50, 1957.

CHARLES F. OSGOOD.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as fdllows: Pagesecond column, line 66, claimll, after the vyord "structure" insert'acommag' page 6, second column line 9, claim 26, after "and" inserttilting; and that the said Letters Patent should be read with thiscorrection therein that the same may conform to the record of the casein the Patent Office.

Signed and sealed this let day of February, A. D. 1938.

Henry Van Arsdal'e, (Seal) Acting, Commissioner of Patents.

